mediatek: mt8192: Add CPU hotplug and MCDI support

Implement PSCI platform OPs to support CPU hotplug and MCDI.

Change-Id: I31abfc752b69ac40e70bc9e7a55163eb39776c44
diff --git a/plat/mediatek/mt8192/include/platform_def.h b/plat/mediatek/mt8192/include/platform_def.h
index 8d43dc8..163ea61 100644
--- a/plat/mediatek/mt8192/include/platform_def.h
+++ b/plat/mediatek/mt8192/include/platform_def.h
@@ -70,11 +70,12 @@
  ******************************************************************************/
 #define PLATFORM_STACK_SIZE    0x800
 
-#define PLAT_MAX_PWR_LVL        U(2)
+#define PLAT_MAX_PWR_LVL        U(3)
 #define PLAT_MAX_RET_STATE      U(1)
-#define PLAT_MAX_OFF_STATE      U(2)
+#define PLAT_MAX_OFF_STATE      U(9)
 
 #define PLATFORM_SYSTEM_COUNT           U(1)
+#define PLATFORM_MCUSYS_COUNT           U(1)
 #define PLATFORM_CLUSTER_COUNT          U(1)
 #define PLATFORM_CLUSTER0_CORE_COUNT    U(8)
 #define PLATFORM_CORE_COUNT             (PLATFORM_CLUSTER0_CORE_COUNT)